There are many different reasons why Wooden Green Onyx is a popular choice. However, before you make your final decision, you should do some research on why or why not it is the right choice for you. Wooden Green Onyx is used for a lot of different things. It can be used in flooring, and of course on counter tops. this type of onyx is so elegant and can warm a room in an instant and when finished it gives a sheen and classic to any palce.